It looks like Microsoft's next-generation Xbox console might be called "Xbox NeXt", and it could beat the capabilities of Sony's rumored PlayStation 4K.
The news was found on the LinkedIn profile of Microsoft's Visual Design Lead David Gardner, who lists the "Xbox NeXt" as a major project in his portfolio. The mysterious Xbox NeXt is listed among previous consoles like the Xbox 360, Xbox One and Smartglass, so there's reason to believe it's an actual console. As for concrete details, there aren't any, but we do have reason to believe it's the next-gen Xbox rather than an upgraded Xbox One.
Xbox boss Phil Spencer recently said that Microsoft doesn't want to do an "Xbox One.5", and that console upgrades should be substantial instead of minimal. Based on this, we can assume that the Xbox NeXt is not a console iteration, but a brand new generation of consoles. Spencer has also teased that the next Xbox would be modular and feature upgrade-able hardware like a PC, so we might even see the Xbox NeXt hit native 4K gaming by leveraging the power of an ecosystem of external AMD Polaris GPUs tethered to a traditional console APU system.